Zoom lens having a capability of introducing special features in

Details Zoom lens having a capability of introducing special features in Zoom lens having a capability of introducing special features in

1985-11-15

1988-11-01

Corbin, John K.

350423, 350431, G02B 1514, G02B 15177, G02B 1318

Patent

active

047814462

ABSTRACT:
A zoom lens having a plurality of lens units with the air separations, at least one of which is varied to effect zooming, the rearmost lens surface of successive two of the lens units and the frontmost lens surface of the rear one being both formed to convex shapes toward the front, whereby when these two lens units axially move at different speeds from each other, a soft-focus effect of varying magnitude is produced on the image.

REFERENCES:
patent: 4124276 (1978-11-01), Okano et al.

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